DEMU - Diesel Electric Multiple Unit
DEMU stands for Diesel Electric Multiple Unit
A Multiple unit Train
Powered by onboard Diesel Engines
A diesel engine drives an electrical generator/alternator which produces electrical energy. The generated current is then fed to electric traction motors on the wheels or bogies in the same way as a conventional diesel-electric locomotive.
No need for a separate locomotive as the same is incorporated in one of the carriages.
Each passenger-carrying car - Its own source of motive power fitted below the Coach.
Does not need reversal at both ends (Terminals). This will reduce a lot of traveling time by eliminating shunting operations.
Quick acceleration & deacceleration render them most suitable for short-distance passenger trains.